ExpeditersOnline.com
Try Hours
Bolt Express
Results 1 to 10 of 10

Thread: Fan Switch

  1. #1
    Senior Member
    Join Date
    Apr 2009
    Location
    Bloomsburg, PA
    Posts
    159

    Fan Switch

    Does anyone know if you can have a driver controlled fan switch installed for a CAT 3126?

  2. YOU decide your loads, your schedule, your home time with Landstar
    Landstar Express America
    As a "Business Capacity Owner" or BCO with Landstar, you control your business the way YOU want. You select the freight. You set your schedule. You decide on home time. At Landstar, owner/operators are compensated based on a fixed percentage of the revenue generated from the freight they haul. As rates increase, so does your compensation. Landstar is hiring Owner/Operators... Apply now!
     

  3. 1,378187,42594,8
  4. #2
    18K Member greg334's Avatar
    Join Date
    May 2005
    Posts
    20,280

    Re: Fan Switch

    I think you can.

    I read somewhere there was a setting for it in the ECM, but you may want to call cat and ask them if there is a kit for it.

  5. 2,378189,42594,8
  6. #3
    18K Member layoutshooter's Avatar
    Join Date
    Mar 2005
    Location
    Monroe, MI.
    Posts
    32,088

    Re: Fan Switch

    I sure wish I had one on my truck. That is a very good tool to have.

    Duty Honor Integrity
    Peace Through Superior Firepower
    Security Through Strength

    "The democracy will cease to exist when you take away from those who are willing to work and give it to those who would not"

    Thomas Jefferson

    Freedom is found only in self reliance

    Layoutshooter

  7. 3,378190,42594,8
  8. #4
    Member
    Join Date
    Sep 2009
    Posts
    38

    Re: Fan Switch

    Yes you can. I have a 1998 FL70 with the 3126 that I bought used and it has one on the dash. It looks like it was added aftermarket.

    Watching that temperature gauge drives me crazy though. It sure seems like I have to flip that switch on alot.....but when I do its runs the temperature gauge back down quickly.

  9. 4,378500,42594,8
  10. #5
    18K Member greg334's Avatar
    Join Date
    May 2005
    Posts
    20,280

    Re: Fan Switch

    If you are watching the gauge too much, then maybe you have a problem?

  11. 5,378513,42594,8
  12. #6
    Member
    Join Date
    Sep 2009
    Posts
    38

    Talking Re: Fan Switch

    I do feel like I have to watch the gauge too much. I haven't taken it to Cat yet to have them look over it (or have them plug it in).

    The engine is remanufactured and I had to have a new head gasket put on a while back and things have been relatively good. No bubbles in the coolant (I put the good stuff in) and it uses none. But before all of that I repalced the water pump, thermostat, temperature sensor, the sensor by the AC dryer, tensioner pulley, new belts, radiator (fill tank) cap, etc.

    I keep the radiator, CAC, AC condenser all cleaned out.

    I try to take pretty good care of things......

    BUT.......that switch is on the dash for a reason

  13. 6,378555,42594,8
  14. #7
    Senior Member
    Join Date
    Apr 2009
    Location
    Bloomsburg, PA
    Posts
    159

    Re: Fan Switch

    Thanks for the feedback. Much appreciated.

  15. 7,378564,42594,8
  16. #8
    Senior Member
    Join Date
    Apr 2009
    Location
    Bloomsburg, PA
    Posts
    159

    Re: Fan Switch

    I discussed this with the CAT dealer I use and trust. The service manager told me it could be done, but that he strongly recommended it not. He stated that the fan not only serves an important function of cooling the radiator, but it also helps cool the A/C compressor. To have a manual control switch that is used only when one deems necessary for the engine temperature, could lead to damage to the A/C. I decided to take his advice and leave things as they are.

  17. 8,383302,42594,8
  18. #9
    Senior Member jjoerger's Avatar
    Join Date
    Feb 2009
    Location
    Lake City, FL
    Posts
    2,059

    Re: Fan Switch

    Quote Originally Posted by MYGIA View Post
    I discussed this with the CAT dealer I use and trust. The service manager told me it could be done, but that he strongly recommended it not. He stated that the fan not only serves an important function of cooling the radiator, but it also helps cool the A/C compressor. To have a manual control switch that is used only when one deems necessary for the engine temperature, could lead to damage to the A/C. I decided to take his advice and leave things as they are.
    We have one on our Mercedes MBE4000. It will turn the fan on so it stays on all the time. If you turn the switch off it goes back to working automatically. Never had to use it. Our fan kicks in right when it should.

  19. 9,383303,42594,8
  20. #10
    18K Member greg334's Avatar
    Join Date
    May 2005
    Posts
    20,280

    Re: Fan Switch

    I never heard of it cooling the compressor, it provides a means for the condenser to remove some of the heat from the compressed gas while you are standing, idling or running really slow.

    The gas needs to get rid of the hear built up from the compression cycle, and the compressor may benefit from it by lowering the outlet pressure but I can only see this happening if the airflow it low across the compressor.

    The switch is a doable thing, the ecm will kick on the fan if there is an issue with either the coolant temps being high or if the condenser pressures are out of range - it is a backup for people who leave the fan off. The switch goes right to the ecm, not the fan.

  21. 10,383320,42594,8

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
ExpeditersOnline.Com Copyright © 1999-2011 On Time Media, LLC. All Rights Reserved.
ExpeditersOnline.com © is a registered trademark of On Time Media, LLC

Search Engine Optimization by vBSEO 3.6.0 PL2